package gateway.fallbacks;

import org.springframework.cloud.netflix.zuul.filters.route.FallbackProvider;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpStatus;
import org.springframework.http.MediaType;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.stereotype.Component;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;

/**
 * Created by wiselyman on 2017/5/4.
 */

@Component
public class ServiceFallbackProvider implements FallbackProvider
{
	@Override
	public String getRoute()
	{
		return "*";
	}

	@Override
	public ClientHttpResponse fallbackResponse(String route, Throwable cause)
	{
		return new ClientHttpResponse()
		{
			@Override
			public HttpStatus getStatusCode()
				throws IOException
			{
				return HttpStatus.OK;
			}

			@Override
			public int getRawStatusCode()
				throws IOException
			{
				return 200;
			}

			@Override
			public String getStatusText()
				throws IOException
			{
				return "OK";
			}

			@Override
			public void close()
			{

			}

			@Override
			public InputStream getBody()
				throws IOException
			{
				return new ByteArrayInputStream("服务故障，请稍后重试!".getBytes());
			}

			@Override
			public HttpHeaders getHeaders()
			{
				HttpHeaders headers = new HttpHeaders();
				headers.setContentType(MediaType.APPLICATION_JSON_UTF8);
				return headers;
			}
		};
	}
}

